Chute door control



Oct. 18, 1932- c. H. CHUBBUCK GHUTE DOOR CONTROL Filed Feb. 21. 19:0

2 Sheets-Sheet l Oct. 18, 1932 c CHUBBUCK 1,883,569

CHUTE DOOR CONTROIJ Filed'Feb. 21, 1930 2 Sheets-Sheei 2 Patented Oct. 18, 1932 UNITED STATES EN OFFICE CLARENCE H. onu Boo or BALA-cYNwYn, PENNSYLVANIA, ASSIGNOR To nAsLmr cnu'rn AND ooNvnYon'coMrANY, or OAKS, PENNSYLVANIA, A CORPORATION or PENNSYLVANIA on'urn noon coN'rnon Application filed reb ar 'a 1930. Serial o; 430,218.-

My invention relates to the inlets for chutes such, for example, as are required at dlfi'erent floors of buildings in the use of trash chutes,

laundry chutes, etc.

The main purpose of my invention isto secure simplicityof construction along with positiveness and reliability of action.'

A furtherpurpose is to provide cooperating chute doors with interfitting disc locks,

each of which is cut out to allowmovement of the other in one position.

A further purpose is to provide projections movable with one door which fit into the path of movement of a member movable with the other door. i

Further purposes will appear in the speci fication and int'he'claims. p I p I have preferredto'illustrate my invention by but one main form, selecting a form which is practicable, efiicient and inexpensive and which atthe same time well illustrates the principles involved. I p

Figure 1 is a vertical sectionta'ken upon line 11 of Figure 2, showing the chute entrance fully with afragment of the chute'to which it forms entrance. I

Figure 1a is a fragmentary sectionon the line 1a,1a of Figure 1. p

s Figure "2'is a front elevation of the struc Figures 3 and 4 are 'enlarged'fragmentary sections showing structure seen in Figure; 1, but in different positions. p j

T Figure 5 is a diagrammatic view corre- "'3 spending generally to Figure-3; and'Figur-e 6 is a similarview correspondlng"to Figure 4. A F I In the drawings similar numerals indicate lilreparts. r V

ent floors or levels, nd at the same time'protect against outlet of dust or fumes from the chute, it is customary to use two chute doors, of whichone closes ofi theinouth'of-the inlet and the other closes the connection between 'pense.

ed'or otherwise secured .to contnol dZiSCSlH,

upon the .rod or about its rod. For the rea- In W chute constructions o'ff'th'e character which are "intended to permit inlet at differa time in order that in all positions of the doors there'may be a seal against emission of-dust, fumes or flame through the inlet;

There are several devices of this character at present on the market which secure the result -Myinvention is intended to secure'the same end with a minimum of complication and cx The front chute wall 5' "is shown in fragmentary form. The inlet chute hopper bis connected with it at the top at 7 and atlthe bottom. at 8 and comprisesthe body of the hopper 9 and a housing 10 within which the doors 11 and 12 are hinged .aboilt rods 13 and 14 and'which holds and protects the interlocking mechanism. The connection at 1.7

'may desirably be through the use of'a channel yoke 7 secured in the wall structure; A

door opleninghandle may be seen at 13' The 'opper 9 may be of any suitable form, and it, the chute, the connections with the chute and the housing are intended to "bed!- lustrated conventionally. i

The fastening of the doors :to their shafts is conveniently effected by edge-suppolting braces 15, 16 rigidly secured to the doors at or near their edges and which are spot-weld- 18, preferably two for each rod, which may befastened to swing with the rod or :Enee'to swing about it as desired. Each idoorthus swings as a unit with the two terminal discs son that I desire ordinarily itomser'thicker and stiffer material for-the braces 15 and 16 than is necessary for'the doors I prefer to use separate braces ratherthan to for'mflle braces as flanges from the :edges of the doors. Flanges 19, 2O onxthe members 15 and 16 may be used to better'secure the doors itothe braces, preferably'by spot-welding as at points 21. n

he construction of the housing is not -iIltended to'involve, any special features'bas it may 'be greatly varied, providing :it-performv the function of ,afi'ording -movab1e1support for the two shafts or rods ator near-the ends of the shafts,:and -at allitimesiafiords a cover to prevent flow of gas from the chute.

In the illustration the housing is provided with side closing and shaft supporting walls 22, top and front walls 23 .and 24 and partition 25.

The control between the two doors, preventing openings of one when the other is open, is effected by the alined control discs which are larger in diameter than the distance .between their axes and from which corresponding sectors 26 and 27 are cut out to the diameter of the discs. Each sector can be outlined by the movement of a point on the circumference of the other disc when the center of thesector lies between the axes of the 'two shafts. V

The upper edges 28 and 29 of the sectors are substantially in line when the doors are closed so that the movement of either door brings the edge and segment adjoining it wholly within the path of movement of the edge of the other disc to prevent motion of the other disc and consequentlyto prevent movement of the other door. The portion 30 of each disc adjoining the edge of the cut acts as a stop to prevent improper movement of the other door. 7

fFrom Figures and 6 it will be seen that the full surfaces of the discs need not be used for the stop functions since the operative parts of the discsfor stop uses comprise the edges 31 .and 32 and the are surfaces 26' and 27 which they are adapted respectively to engage. In the position of Figure 5 the cam 18 is free to move in either direction, while the cam '17 is locked in both directions, against opening by the cam 18 and against closing because the door 11 is already closed. In Figure 6 the cam 17 is free to move in either direction, while the cam 18 is locked in both directions, against opening by the cam 17' and against closing by the frame of the door 12.

From the diagram in Figures 5 and 6 it will be apparent that a part only of each of the discs of Figures 3 and 1 is effective for -stop purposes and that the discs are made in that shape because of conditions of appearance, convenience of manufacture and ease 'of attachment to or mounting for bearing upon their respective rods rather than because of the usefulness of the remainder of the disc portions. It is for this reason that the discs are referred to in the claims as stops.

From Figures 5 and 6 it will be seen that each of the stops will utilize asegment only I from point 33 to point 34, but slightly ex- 1 ceeding in its angle 85 the angle 36 of swingor 27 is required, and the remaining circuming movement intended to be given to its door, No outline or interior limit of the recess 26 ference of the discs shown is used for the purpose only of affording attachment of the doors.

The discs 17 and 18 form convenient means of attachment of the door structures to the shafts, and the discs can be fastened to the shafts and the door structures can then be securedto the sides of the discs directly, if desired, or permissibly by reinforcing side members and 16.

However, neither the discs nor the doors need be secured to the shafts, provided at least one disc is secured to onedoor and a cooperating disc to the other door.

The construction shown for door 12 (best seen in Figure 1a) utilizes flanges 2O turned over from the members 16 for attachment to the door, and shows the outside edge of the door bent over at 83 to lock against the upper edge 84 of thehopper 9.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident toothers skilled in the art, to

obtain all or part of the benefits of my in vention without copying the structure shown,

and I, therefore, claim all such in so far as they fall within the reasonable spirit and scope of my invention. I

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a chute inlet, an inlet casing, a pair of chute doors therefor pivoted to swing upon adjacent axes, and controlling stop devices swinging coaxially with the doors and each with opening movement swinging into the path of movement of the other whereby when one has begun to open the other cannot be opened.

,2. In a chute inlet, an inlet casing, a pair of doors therein mounted to swing about parallel adjoining axes and cooperating discs carried by the doors having recesses permitting movement of one disc within the recess of the other when the first is closed and stoping movement of each by the circumference of the other when the other is opened.

3. In a chute inlet, a chute wall, an inlet casing attached to the wall, a door controlling the opening from the chute inlet into the chute, a second door controlling the inlet into the chute inlet casing, pivot rods for the two doors about whose axes the doors respectively planes, each disc being cut away through a space overlapped by the other in operation and means for mounting the discs rigidly with respect to the doors whereby, both doors being closed, opening movement of either door will cause its disc circumference to enter the path of movement of the other disc, preventing opening movement of the other disc.

4. In a chute inlet, a chute wall, an inlet casing thereto, a pair of doors controlling admission to the chute inlet and from it through the chute wall, rods about whose axes the respective doors swing, stifiening edges for the doors extending beyond the axes, discs rigidly secured to the stifi'ening edges and adapted to oscillate around the axes of the respective rods, the discs overlapping and when one door only is open fitting the disc of v the open door'into an opening in the disc of the other door.

5. In a chute inlet, an inlet casing, a pair of cooperating doors therein supported to swing away from each other for opening movement of the doors, a pair of stops coaxia1- ly swinging, one with each door into the path of movement of the stop of the other door whereby each stop, when its door has begun opening movement bars opening movement of the stop of the other door, and a lever for opening one of the doors.

6. In a chute inlet, an inlet casing, a pair of cooperating doors within the casing supported to swingaway from each other for opening movement of the doors, and a pair of stops swinging one with each door into the path of movement of the other door whereby each stop, when its door has begun opening movement bars opening movement of the stop of the other door, each door being free to move by reason of pressure exerted upon the door itself when the other'door is closed. 1

7. In a chute inlet, a casing having an inlet opening in substantially horizontal position and an outlet opening into the chute in substantially vertical position, a door closing the inlet opening and a door closing the outlet opening into the chute, the inlet door being adapted to be lifted by hand when the outlet door is closed and the outlet door being adapted to be opened by hand when the inlet door is closed anddiscs swinging with the two doors each recessed in the form of an arc permitting movementof the circumference of the other within the recess. CLARENCE H. 'CHUBBUCK. 

